"Arch developers made a huge effort on making sure all the packages work with Python3. And were active at fixing all the incompatibilities."
So? That has nothing to do with user scripts.
"Hopefully Fedora will switch to Python3 as well. No more procrastination! Python community should more forward."
Fedora will switch to Python 3 as will other distributions but unlike Arch will not make /usr/bin/python point to Python 3 by default. This entire conversation has nothing to do with procrastination or not moving forward.